Kolpodea.] T HE INFUSORIA. 307 



FAMILY XX. KOLPODEA. 



Animalcules whose polygastric digestive apparatus is 

 furnished with an alimentary canal, the orifices of which 

 are not at opposite extremities of the body. They have no 

 shell or lorica ; they are furnished with cilii, disposed in 

 longitudinal series, which are subservient to locomotion 

 and purveyance. In all of them numerous digestive cells 

 have been demonstrated by means of coloured food, as 

 likewise both orifices of the alimentary canal ; the digestive 

 juice (bile) is colourless. The ova are scattered and 

 numerous ; in the genus Kolpoda expulsion of the ova has 

 been seen. The male generative structure is of a double 

 kind, and complete self-division is frequent, but no forma- 

 tion of clusters or gemmae is seen. A sensitive system is 

 indicated in one genus (Ophryoglena) by the presence of a 

 visual point. 



The genera are disposed as follows : 



r absent on the back Kolpoda. 



Short protruding tongue. Cilii < 



Lpresent every where .... Paramecium. 

 Eye absent. 



r with tail and proboscis .. Amphileptus. 

 No tongue < 



Lwith tail, no proboscis . . Uroleptus. 



Eye present Ophryoglena. 



Genus CXX. KOLPODA. The bosom Animalcules are 

 provided with a little tongue-like member, have their 

 under surface furnished with cilii (none on the back), but 

 have no eye. Their motion is not active, the cilii being 

 few. The mouth, termination of the alimentary canal, and 

 numerous polygastric cells, may be demonstrated in one 



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